1. Which of the following is a phospholipid?
- Sterol
- Cholesterol
- Lecithin
- Steroid
Answer: Lecithin
2. Which of the following groups is a type of aromatic amino acids?
- Glycine, Tyrosine, Arginine
- Phenylalanine, Tyrosine, Tryptophan
- Arginine, Histidine, Isoleucine
- More than one of the above
Answer: Phenylalanine, Tyrosine, Tryptophan
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3. Which of the following is an amino acid which is not considered aromatic?
- Valine
- Tyrosine
- Phenylalanine
- Tryptophan
Answer: Valine
4. Enzymes, antibodies, and hormones are examples of:
- Carbohydrates
- Proteins
- Lipids
- Nucleic acids
Answer: Proteins
5. The genetic material of cells is composed of:
- Proteins
- Carbohydrates
- Lipids
- Nucleic acids
Answer: Nucleic acids
6. Which biomolecule stores genetic information and directs cellular activities?
- Carbohydrates
- Proteins
- Lipids
- Nucleic acids
Answer: Nucleic acids
7. Identify the basic amino acid from the following.
- Lysine
- Valine
- Tyrosine
- More than one of the above
Answer: Lysine
8. The cells having well - organized nucleus with a nuclear membrane are designated as_______.
- Cheek cells
- autokaryotic cells
- eukaryotic cells
- prokaryotic cells
Answer: eukaryotic cells
9. Biomolecules are characterized by
- Alanine amino acid – a fatty acid with an amino group and an acidic group throughout the molecule
- Palmitic acid – a polyunsaturated fatty acid with 18 carbon atoms
- Lecithin – a phosphorylated glyceride found in the cell membrane
- Adenylic acid – adenosine combined with glucose phosphate
Answer: Lecithin – a phosphorylated glyceride found in the cell membrane
10. It is possible to classify enzymes, vitamins, and hormones as a single category of biological chemicals because they all
- Enhance oxidative metabolism
- Are conjugated proteins
- Are exclusively synthesized in the body of a living organism
- Help in regulating metabolism
Answer: help in regulating metabolism
11. What is the most critical property of an enzyme?
- Composition
- Thermal denaturation
- Specificity
- Solubility
Answer: Specificity
12. Which enzyme catalyzes the oxidation of hemoglobin?
- Oxidase
- Catalase
- Amylase
- Coenzyme
Answer: Oxidase
13. If the DNA percentage of thymine is 20 then what will be a percentage of guanine?
- 20%
- 30%
- 40%
- 60%
Answer: 20%
14. Which biomolecule is the primary source of energy in living organisms?
- Proteins
- Carbohydrates
- Nucleic acids
- Lipids
Answer: Carbohydrates
15. The building blocks of proteins are:
- Nucleotides
- Amino acids
- Monosaccharides
- Fatty acids
Answer: Amino acids
16. The monomer units of nucleic acids are:
- Amino acids
- Nucleotides
- Monosaccharides
- Fatty acids
Answer: Nucleotides
17. Which of the following is a polysaccharide used for energy storage in plants?
- Cellulose
- Glycogen
- Starch
- Chitin
Answer: Starch
18. Koshland’s theory of enzyme action is known as
- Lock and key theory
- Reduced fit theory
- Induced fit theory
- Enzyme coenzyme theory
Answer: Induced fit theory
19. Which is the most abundant biomolecule on earth?
- Mineral salts
- Proteins
- Lipids
- Carbohydrates
Answer: Carbohydrates
20. The fastest enzyme is
- DNA gyrase
- Pepsin
- DNA polymerase
- Carbonic anhydrase
Answer: Carbonic anhydrase
21. Identify the basic amino acid from the following.
- Lysine
- Valine
- Tyrosine
- More than one of the above
Answer:Lysine
22. What is a non-reducing carbohydrate?
- Glucose
- Maltose
- Sucrose
- Fructose
Answer: Sucrose
23. Which enzyme catalyzes the hydrolysis of glucose?
- Glucosidase
- Trypsin
- Peptin
- Alcalase
Answer: Glucosidase
24. Cellulose is
- Monosaccharide of glucose
- Disaccharide of Glucose
- Polysaccharide of glucose
- Monomers of Glucose
Answer: Polysaccharide of Glucose
25. Which monosaccharide is known as "blood sugar"?
- Glucose
- Fructose
- Galactose
- Sucrose
Answer: Glucose
26. Which of the following is a disaccharide?
- Glucose
- Fructose
- Sucrose
- Starch
Answer: Sucrose
27. Which is a reducing sugar?
- Galactose
- Gluconic acid
- Sucrose
- β-methyl galactosidase
Answer: Galactose
28. The most common secondary structure of proteins is
- β-pleated sheet
- β-pleated sheet parallel
- β-pleated sheet non-parallel
- α-helix
Answer: α-helix
29. Haemoglobin has
- Primary structure
- Secondary structure
- Tertiary structure
- Quaternary structure
Answer: Quaternary structure
30. Which of the following are not secondary metabolites in plants?
- Rubber, gums
- Morphine, codeine
- Amino acids, glucose
- More than one of the above
Answer: Amino acids, glucose
31. Inulin is characterized by…………
- Lipid
- Protein
- Polysaccharide
- Vitamin
Answer: Polysaccharide
32. Which of the following is NOT a function of lipids in living organisms?
- Long-term energy storage
- Insulation and cushioning
- The structural component of cell membranes
- Enzymatic catalysis
Answer: Enzymatic catalysis
33. Most abundant RNA in the cell
- rRNA
- mRNA
- tRNA
- tRNA threonine
Answer: rRNA
34. Which of the following is not a function of lipids?
- Energy storage
- Structural component of cell membranes
- Enzyme catalyst
- Insulation
Answer: Enzyme catalyst
35. Which biomolecule is distributed more widely in a cell?
- Chloroplast
- RNA
- DNA
- Spaherosomes
Answer: RNA
36. Name the simplest amino acid
- Alanine
- Tyrosine
- Asparagine
- Glycine
Answer: Glycine
37. β-oxidation occurs in
- Nucleus
- Cytoplasm
- Mitochondria
- Chloroplast
Answer: Mitochondria
38. Balbiani rings present inside the chromosomes are sites of
- RNA formation
- DNA replication
- Translation
- More than one of the above
Answer: RNA formation
39. Which of the following is the non-proteinaceous enzyme
- Deoxyribonuclease
- Ligase
- Ribozyme
- Lysozyme
Answer: Ribozyme
40. Which is the most abundant protein in the human body??
- Collagen
- Myosin
- Actin
- Albumin
Answer: Collagen
41. Mineral associated with cytochrome is
- Mg
- Cu and Ag
- Fe
- Cu
Answer: Fe
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